I have one gallon (approximately) left over from a flat roof recoat project. Opened yesterday, 2nd coat today. I am done with it. If you know this product you know it doe not last long in the can. I have it sealed up tight, but best to use it within a few days. Text me and the first one who does I will tell you where it is to come get it. Southwest Minneapolis, not far from 50th and Xerxes. One gallon should be enough for a small RV. I did 2 coats on a 20 by 20 roof. Six one two, Five 01, 7four four 3. Text me.